I'm with AA, had problems very early on, traffic was really slow.
Hopped on IRC and nobody was talking slowness, so I was assuming it was my end still, but then somebody mentioned sluggishness, so I spoke up.
Quick traceroute later and within 5 minutes I had a new pppoe user to try, which moved my routing to a different router in docklands, and all was good. 10 minutes later they've shifted everyone to that and taken the router out for investigation.
Ah yeah. Place an order, find out an hour later only 75% of it is actually in stock. The 75% comes in 5 boxes from various locations at random times over the next week.
At least it's not CPC. They sent me an empty box once.
There are a lot of problems reported on thinkbroadband forums for zen about some new routing configuration they are doing, which is meant to be better but is in reality a lot worse.
I wouldn't be surprised if this is related to that someway!
Except farnell.com which is shit everywhere because their entire platform is a turd.